Structural defence mechanisms in groundnut to late leaf spot pathogen


158

Authors

  • C.D. MAYEE and A.P. SURYAWANSHI Marathwada Agricultural University, Prabhani 431 402

Keywords:

Defence mechanism, groundnut, Phaeoisariopsis personata, infection process

Abstract

Five late leaf spot (LLTS) resistant genotypes of groundnut viz., Nc Ac 17133, PI 259747, PI 381622, PI 390595 and PI 405 132 were screened along with two susceptible cultivars JL-24 and UF 70-103, for morphological and anatomical features. Resistant genotypes were characterized by smaller size stomata of low frequency, compact palisade layer, thicker epidermis-cum-cuticle and presence of trichomes on abaxial surfaces of leaves. Prolonged incubation period of LLS in resistant tissue was a consequencelate appearance of intracellular hyphae, occlusion of intercellular spaces and accumulation of mycelial mass below epidermis. Infection of LLS in susceptible tissues was marked by thickening of palisade cells, formation of swollen cells in a narrow zone some distance away from the site of infection. The chloroplasts normally disappeared in palisade cells before production of dense stroma and conidiophores. Rupturing of epidermal wall was clearly evident. However, in resistant tissues, discreet stroma and late occurrence of epidermal cracks were observed.

Issue

Vol. 48 No. 2 (1995): Indian Phytopathology

Section

Research Articles

License

For Authors

As soon as an article is accepted for publication, authors are requested to assign copyright of the article (or to grant exclusive publication and dissemination rights) to the publisher (Indian Phytopathlogical Society). This will ensure the widest possible protection and dissemination of information.

For Readers

While the advice and information in this journal is believed to be true and accurate at the date of its publication, the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may have been made. The publisher makes no warranty, express or implied, with respect to the material contained herein.

All articles published in this journal are protected by copyright, which covers the exclusive rights to reproduce and distribute the article (e.g., as offprints), as well as all translation rights. No material published in this journal may be reproduced photographically or stored on microfilm, in electronic data bases, on video disks, etc., without first obtaining written permission from the publisher. The use of general descriptive names, trade names, trademarks, etc. in this publication, even if not specifically identified, implies that these names are protected by the relevant laws and regulations.

How to Cite

A.P. SURYAWANSHI, C. M. and. (2002). Structural defence mechanisms in groundnut to late leaf spot pathogen. Indian Phytopathology, 48(2), 160-165. https://epubs.icar.org.in/index.php/IPPJ/article/view/20709